Machine for



(No Model.) 2 Sheets-Sheet 1.

W. H. BLANGHARD.

MAGHINE FOR FILING COTTON GIN AND LINTER SAWS.

No. 280,000. Patented July 10, 1883.

W Maw I Ill/3671257:

2 Sheets-Sheet 2.

Patented July 10, 1883. 5 Liz B W. H. BLANOHARD.

.LII i (No Model.)

MACHINE FOR FILING COTTON GIN AND LINTBR SAWS. $10,280,900.

UNITED STATES PATENT .rrrcs.

WILLIAM H. BLANOHARD, OF GAINESVILLE, GEORGIA.

MACHINE FOR FILING COT'I'ON-GIN AND LlNTER SAWS.

SPEGIFIGATIONforming part of Letters Patent No. 280,900, dated July 10, 1883. Application filed Jn1 110, 1882. (No model.)

To aZZ whom it may concern Be it known that I, WILLIAM H. BLANCH- ARI), a citizen of. the United States, residing at Gainesville, in the State of Georgia, have invented certain new and useful Improvements in Saw-Filing Machines; and I do hereby de' clare the following to be a full, clear, and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and

- to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to mechanism designed for forming rounded needle-pointed teeth on gin and linter saws; and it consists in certain features, hereinafter described, and specifically set forth in the claims.

Figure l isa side elevation of a machine embodying my invention, in which figure portions are represented in section and portions are removed. Fig. 2 is a plan with portions removed or broken away, and Fig. 3 is a detail.

Like letters represent like parts in all the figures.

The frame-work of the machine consists of a rear upright and rectangular end piece, a, to which are secured by bolts horizontal side rails, b b, which are united at the front byan integral cross plate or rail, 0.

. -At each outer side of the rails bl) are secured cheek-pieces d (1, adapted to receive restrails e e, which are shown, for lack of space, broken off, but which are designed to be ex,- tended, and when the machine is in use rested upon the shaft or arbor of the saw being filed, in order to support the front end of the machine, while the rear end is supported bythe rear end piece, a.

A represents the main or crank shaft of the machine, an d it is provided with a crank, a, and rotates in bearings (6 fixed to the side rails, b b. V

" At the center of shaft A is a fixed mastergear, A, which meshes with apinion, B, fixed to a short counter-sh aft, 0, mounted in bracketbearings 0', formed upon or secured to the rear end piece, a.

Upon the ends of counter-shaft O are fixed disks G, to which are attached, by ordinary adjustable wrist-pins c", connecting-rods D D,

each end of its reciprocative stroke.

the head (1 of each of which is at d pivoted to the rods. The rod D is pivotally comlected to a similar head, (2, at its front end,'which head is pivotally connected by abolt or screw, (2 to'a cross-head, E, located above the horizontal center of the machine, while rod D is in like manner connected and arranged with reference to a second crosshead, E, extended below said center of the machine, the construe tion of the parts in each being as follows: Each of the cross-heads slides upon guides E supported at their rear ends upon studs F, secured by set-screws f? in sockets formed upon the side rails, 6, having slotted inwardly-projecting curved arms f, and at their front ends said guides rest against the upper and lower surfaces, respectively, of the cross-bar c of the frame-work, which is slotted at c c for the passage therethrough of bolts f f which bind said front ends of the guides E to links G G, the outer ends of which are connected by a pin or bolt, 9, passing through a slot, 0, in the cross-bar 0. One of the links, G, is provided with a projecting arm, G, constituting with the link a bell-crank, which is connected by a rod, G with bar G, supported upon the inside of the bearing a and in the rear frame piece, a, and provided with an inwardly-projecting lug, 9, said bar G being operated by a wrist-pin, h, in a disk, H, secured to the main shaft A, as shown in Fig. 2. The rear ends of the guides are adjustably secured in the slots of the arms f of the studs F. Springs I I rest at their rear ends against therear side of the armsf, and are curved to conform thereto, and are extended to the front and rest one upon each of the guides E and against its edge, as clearly shown in Fig. 1. Screws 4' 72 (shown in dotted lines, Fig. 2) serve to vary the tension of the springs. Each of the cross heads is connected to a file-holder, J, shouldered at its rear end, as shown in Fig. 3, to fit a bearing for the same formed in the crosshead, and of cylindrical form in cross-section, to fitsuitable bearings, E", therefor, formed in the front ends of the guides. Each of the holders is exteriorly grooved, as at j, and in each of the bearings E is a screw, j, which projects into the groove j, which is of such a contour as to partially rotate the holder at A set screw, serves to secure the shanks of the files K within the holders. The files are diamond shape in cross-section, and are presented to the saw L,'so that one of the sides of the file is brought into contact with the teeth of 5 the saw.

M represents a yoke, the rear ends of which are fitted in bearings m, formed on the rear frame, a, and inclose coil-springs, (see dotted lines, Fig. 1,) which encircle said yoke ends and act to draw-the yoke rearwardly, while lugs m m" thereon, when acted upon by pro jecting wrist-pins or lugs m m formed on the master-gear A, act to force the yoke forward.

A feed -bar, N, is pivotally secured to the I 5 front end of the yoke and extends to the saw L, and is provided with a chisel, n, and depending side tongues, 12, by which latter devices it is kept in line with and upon the saw.

The above being the construction, the operation is as follows: The rest-rods e 6 being placed upon the shaft or arbor of a saw, and the rear frame-piece, a, upon an adjacent surface of a gin, orupon any suitable table or support, and the feed-bar N upon the saw, as 2 5 shown, power is applied to the crank a, and during each rotation thereof the following movements of the elements of the machine take place: Taking these at the positions shown, the first to act is the pin h of disk H upon lug g on bar G which is forced back. This, through the medium of rod G and bellcrank G, brings the links G less nearly into line with each other, and consequently draws the forward ends of the guides E toward each other, and whereby the files are moved later-' ally away from the saw, they being crossed before reaching the saw. As this inward movement of the guides is forced against the tension of springs I I, they (the springs)-act to bring the parts back to position as soon as pin h passes by lug g, and the position to which they are brought is limited and determined by the contact of thefiles with the teeth of the saw, and this contact is regulated in pressure by the tension of the springs, and this is, as before stated, regulated by means of the screws 2'. As soon as the files are withdrawn, as above described, pins m on the master gear A strike the lugs m of the feed-yoke M, and force the chisel it into the throat of a tooth and firmly down to the base thereof, so as to uniformly and successively set the teeth of the entire saw. After the feed has taken place the pin h of disk H has passed off the lug g of 55 bar G and the files are each, as described, thrown into contact with a tooth-one in rear of the other in the seriesand a continuation of the rotation of crank a through mastergear A and pinion B, counter-shaft O, disks 0, connecting-rods D D, cross-heads E E, and holders J reciprocates the files as many-times as desired, this being determined by the relative sizes of gear A and pinion B, and at the beginning and end of each movement of the holders they and the files are partially rotated by means of the slot or groove j and screw j,

as described, whereby a rounded and needlepointed tooth is producedthat is, one side of the tooth operated upon by each file is finished to this form, the opposite side of the same toothbeing subsequently finished in like manner by the opposite file, and, by passing successively at least twice, the entire series of teeth are dressed.

By means of the several pivotal and adj usta- 7 5 ble connections of the files supporting and operating elements different angles of presentation and lengths of stroke and timing of their movements are secured.

A collar, M is secured to the under side of So the yoke M to embrace the shaft, if desired, to retain the yoke-in a horizontal position.

Having described my invention and its operation, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of shaft A, gear A, pinion B, shaft 0, and disks 0 with rods D D, sliding cross-heads E E, holders J J, and feedbar N, substantially as shown and described.

2. In a saw-filing machine, the guides E E pivoted at their rear ends to the frame-work and connected at the front ends by links G, and means, substantially as shown and described, for operating the links, substantially as and for the purpose set forth.

3. The combination of the shaft A, disk H, having adjustable pin h, bar G having lug g, connecting-rod G bell-crank G, links G, and guides E pivotally secured to the frame-work, substantially as shown and described.

4. The combination of the pivoted guides E sliding cross-heads E E, and holders J, rotatably secured to the cross-heads and grooved, as at j, with the bearings E and screws j, substantially as shown and described."

5. The combination of the frame I), studs F, having slotted arms 7, and the guides E pivoted to the arms, substantially as shown and described.

6. The combination of the frame I) c b, the upwardly and downwardly projecting studs Eand the guides E E sliding cross-heads E E, and holders J J ,arranged one above and the other below-said frame, substantially as shown and described.

7. The combination of the shaft 0, disks 0, having adjustable wrist-pins c and connect ing-rods D D, one extending above and the other below the frame, and adapted to operate the sliding cross-heads E E, substantially as shown and described.

8. The combination of the disks '0, pins 0 and rod-heads d, pivotally secured to the rods D D and to the sliding cross-heads E E, substantially as shown and described.

9. The combination of the gear A, having pins of, the yoke M, having lugs m m, and the feed-bar N, substantially as shown and described.

Witnesses:

J. A. FINDLEY, J.. M. MoGREw. 

